Look at the actual crime reporting figures, locally rape convictions stand at around 8 per 100,000. Now let's get crazy and say only one in twenty rapes and or sexual assault charges result in a conviction. Let's get even crazier and say one in twenty people who are raped even report the matter. That leaves us with 3200 per 100,000, or about one in thirty. Still almost an order of magnitude smaller than feminist figures and almost certainly still a gigantic exaggeration.
You're missing the dimension of time which crime statistics do include (you didn't include a link, btw). If your hypothesized/extrapolated numbers for rape is multiplied for the same population over a period of, say, 10 years and presuming each year produces new victims, that would mean than a relatively stable population base of 100,000 would yield 32,000 rapes.
It's not like rape (or any crime) only happens in a given population for only one year. People have lifespans and the number of victims accumulate over time, increasing the percentage of people who fall victim.
Your mistake was so easy to catch that if I didn't know better I'd say someone such a miss by someone who's looking so carefully at the data probably has an axe to grind.
Then again, maybe I don't know better and I'll say it anyway.